Code review comment for lp:~julian-edwards/launchpad/builderslave-resume

The new code looks good. You should add an explanation about why you don't disable builders as soon as they've got a failure, i.e. why the threshold exists at all.

Also, in my previous review just prior to commit r11699, I suggested adding several XXXs. Could you please do that.

Do both of these things, and then land.